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the movement of molecules across a membrane against the concentration gradient, from an area of...
a state in which the body has become dependent on a chemical substance in order to function.
a molecule that is converted to adenosine triphosphate (ATP) for energy storage.
a molecule that stores large amounts of energy that can be used for metabolic activity.
endocrine gland situated on top of each kidney, which produces hormones in response to stresses...
parenchyma cells with large air spaces to facilitate floating.
cellular respiration that takes place in the presence of free oxygen.
the branch of the renal artery which carries blood to the nephron, and branches to form the...